.lesson2 div {
	padding: 5px;
	margin-bottom: 2px;
	background: rgba(0,0,0,.1);
}

.black {
	background: #000;
	color: #fff;
}

#board {
	background: #000;
	padding: 5px;
	font-family: sans-serif;
	font-size: 40px;
	display: inline-block;
}

#board.active {
	color: red;
}

#card-trigger{

}

#card {
	display: none;
	background: #eee;
	padding: 20px;
	margin: 10px 0;
}

#card.active {
	background: #555;
	color: #fff;
}
